Suppose delivery time for distributors in an area are normally distributed and have a known population standard deviation of 9 minutes and an unknown population mean. A random sample of 21 distributors is taken and gives a sample mean of 161 minutes. Find the error bound (EBM) of the confidence interval with a 90% confidence level.

Asap for seven months an ice creams vendor collects data showing the number of cones sold a day (c) and the degrees above 70 degrees f the vendor finds that there is a positive linear association between c and t that is the best modeled by this equation c=3.7t+98 which statement is true? the model predicts that the average number of cones sold in a day is 3.7 the model predicts that the average number of cones sold i a day is 98 a model predicts that for each additional degree that the high temperature is above 70 degres f the total of number of cones sold increases by 3.7 the model predicts for each additional degree that the high temperature is above 70 degrees f the total number of cones sold increasingly by 98

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)